Posse, J.A. Memorias del cura liberal don Juan Antonio Posse con su discurso sobre la Constitución de 1812, 1984: t.p. (Richard Herr)

LC data base, 1-9-84 (hdg.: Herr, Richard)

An American family in the Mexican Revolution, 1999: CIP t.p. (Richard Herr) data sheet (b. Apr. 7, 1922)

His vitae, 19 August 2017 (Richard Herr; born: Guanajuato, Mexico, April 7, 1922; higher education: Harvard College (1938-1943), A.B., 1943; University of Paris (Sorbonne) (1945-46), Certificat d'Études supérieures d'Histoire moderne et contemporaine, DiploÌ‚ma d'Études de Civilisation francÌ×aise; University of Chicago (1948-52), PhD in History (1954))

Prabook, 19 August 2017 (Richard Herr, history professor; Mexican history professor; Education: AB, Harvard University, 1943. Doctor of Philosophy, University Chicago, 1954. Doctorate (honorary), University Alcalá de Henares, Spain, 2001)

Biblioteca del congreso (Estados Unidos), 17 enero de 2018: catálogo electrónico https://goo.gl/JCShFW